Study on Mechanical Property of Weld Joint to 900MPa SMAW Electrode in Different Energy Input

The mechanical property of the joint welded in different energy input by SMAW electrode with deposit metal yield strength exceeding 900MPa was investigated.The results indicated that yield strength increased markedly could be,and comprehensive mechanical property was improved when the welding was conducted in lower energy input.For multi-pass welding,yield strength was subjected to finite influence,while toughness was better by rising bead temperature.The structure analysis indicated that there was small residual austenite in the weld joint,which was benefit to improve toughness as tough phase and also could reduce hydrogen induced cracking as hydrogen trapping.